Two temperature-dependent Cd(II)-based coordination polymers with mixed adenine nucleobase and benzene-1, 4-dicarboxylic acid: synthesis, structures and fluorescence properties. Issue 9 (2nd May 2020)

• Record Type: Journal Article
• Authors: Zhao, Hong-Kun; Yang, Han-Wen; Ding, Bo; Wang, Xiu-Guang; Meng, Xian-Chen; Yang, En-Cui
• Is Part Of: Journal of coordination chemistry. Volume 73:Issue 9(2020)
• Page Start: 1490
• Page End: 1501
• Publication Date: 2020-05-02
• Subjects: Adenine -- benzene-1, 4-dicarboxylic acid -- Cd(II) polymer -- crystal structure -- Fluorescence property; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2020.1779929
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: Two Hade-based Cd(II) polymers, [Cd(Hade)(tp)] n (1 ) and {[Cd6 (Hade)6 (tp)6 ]· 9H2 O} n (2 ) (Hade = adenine, H2 tp = benzene-1, 4-dicarboxylic acid), were obtained from the same reaction system at different temperatures which have been characterized by single-crystal X-ray diffraction, elemental analysis, FT-IR spectroscopy, thermogravimetric analysis, and luminescence spectroscopy. Significantly resulting from the synergistic coordination of nucleobase and bicarboxylate groups, they are a 3-D pillared-layer structure for 1 and a 2-D grid structure where the dicadmium paddle-wheel motifs are double bridged by benzene-1, 4-dicarboxylate anions for 2. The supramolecular architecture of 2 is essentially knitted by hydrogen bonding interactions produced by the exocyclic amino/endocyclic imino groups of the nucleobase and the carboxylate groups of the co-ligand to favorably stabilize the high-dimensional supramolecular architectures. At room temperature, 1 and 2 exhibit intense luminescent emissions originating from a Hade-based intraligand and/or photoinduced charge transfer upon adenine binding mode. Graphical Abstract: